/*
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *    ------------------------------------------------------------------------
 *    Copyright (C) 2004-
 *    Salvatore Ruggieri
 *    Dipartimento di Informatica, Universita' di Pisa
 *    Pisa, Italy
 *    ------------------------------------------------------------------------
 *
 */

package apa.data;

/** Elapsed time cronometer. */
public class Cronos {

	/** Start time. */
	private long start;
	/** End time. */
	private long stop;

	/** Constructor. */
	public Cronos() {
		start = stop = 0;
	}

	/** Start the cronometer. */
	public void start() {
		start = System.currentTimeMillis();
	}

	/** Stop the cronometer. */
	public void stop() {
		stop = System.currentTimeMillis();
	}

	/** Get elapsed time in seconds. */
	public double elapsed() {
		return (double) (stop - start) / 1000;
	}
}
